Alzette river restoration in the "Am Brill" nature reserve, Luxembourg

General

National Id:

Lux_03

Site name:

Alzette river restoration in the 'Am Brill' nature reserve in Schifflange

Summary:

The Alzette river (Luxembourg) restoration project aimed at erasing the effect of the river chanelling, which caused the river uniformisation and an ecological impoverishment. The project consisted in a remeandering, increase of the base level of the river, widening of the riverbed, reconnection of the river to existing ponds and creation of a new pond.

NUTS Code:

Luxembourg

RBD code:

LU RB_000

Transboundary:

0

NWRM(s) implemented in the case study:

Re-meandering

Longitude:

6.007891

Latitude:

49.509026

Site information

Climate zone:

cool temperate moist

Mean rainfall:

853

Mean rainfall unit:

mm/year

Average temperature:

9.2

Type:

Case Study Info

Light or indepth?:

Light

Performance

Performance impact estimation method:

Unknown

Biophysical impacts

Retained water:

60000

Retained water unit:

m3/day

Information on retained water:

The water storage restoration contributed to 15 mintutes delay of the peak flow. The maximal flow duration were reduced frome 42 to 24 minutes.

Water quality overall improvements:

Positive impact-WQ improvement

Information on Water quality overall improvements:

Positive effects on water quality are expected, but no assessment has been realised yet.

Soil quality overall soil improvements:

N/A info

Information on Effect delaying peak:

Significant. The peak flow is delayed by 15 minutes.

Lessons, risks, implications...

Key lessons:

The Alzette river restoration project aimed at erasing the effect of the river chanelling, which caused the river uniformisation and an ecological impoverishment. The project consisted in a remeandering, increase of the base level of the river, widening of the riverbed, reconnection of the river to existing ponds and creation of a new pond. The project contributed to restore the flood plain, to prevent flooding and erosion, to restore the natural functionning of the river, to improve the self purification capacity, to improve biodiversity and to intergrate the river in the natural landscape.

Success factor(s):

Financing:

Barrier:

Driver:

Type	Role	Comments
Past flooding events	main driver	A flood event occurred in Schifflange in 1998.

Socio-economic

Direct benefits information:

No information available

Ancillary benefits information:

No information available

Costs investment:

700000

Costs investment information:

The investments were essentialy dedicated to filling and clearing works.

Costs operation maintenance:

No information available

Costs total:

700000

Costs total information:

The investments were essentialy dedicated to filling and clearing works.

Ecosystem improved biodiversity:

1

Information on Ecosystem improved biodiversity:

Biodiversity improvement was expected.

Ecosystem impact climate regulation:

No information available

Policy, general governance and design targets

Policy description:

A flood in Schifflange happened in 1998. A proposition for a project was elaborated afterwards. The main objective was to restore the natural reserve "Am Brill" and to prevent flooding.

Policy pressure:

Policy requirement directive:

Policy impact:

Policy wider plan:

Policy area:

Policy target:

Target purpose
Peak-flow reduction
Improved Biodiversity

Design & implementations

Application scale:

Field Scale

Performance timescale:

< 1 year

Size:

700

Size unit:

m

Design capacity description:

The project was designed to restore the natural functioning of the river.

Constraints:

No main constrain identified.

Design contractual arrangement:

Design consultation activity:

Design land use change:

Design authority:

Authority type	Role	Responsibility	Name	Comments
Local water authority	Initiation of the measure		Municipal council of Schifflange

Last updated: 29 Dec 2014 | Top

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Alzette river restoration in the "Am Brill" nature reserve, Luxembourg

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